Nondestructive replacement device of mutual inductance type three-phase electric energy meter and control method thereof

Abstract

The application discloses a lossless replacement device of a mutual inductance type three-phase electric energy meter and a control method thereof, which comprises a connection power line, a joint junction box connection mechanism and a mutual inductance type three-phase electric energy meter connection mechanism; the connection power line is used for connecting the joint junction box connection mechanism and the mutual inductance type three-phase electric energy meter connection mechanism; one end of the connection power line is connected with the joint junction box connection mechanism, and the joint junction box connection mechanism is used for being connected with a joint junction box; the other end of the connection power line is connected with the mutual inductance type three-phase electric energy meter connection mechanism, and the mutual inductance type three-phase electric energy meter connection mechanism is used for being connected with a mutual inductance type three-phase electric energy meter; the technical problem that a user needs to confirm on site when replacing the electric energy meter by using the existing replacement mode, and the cost of manpower and material resources is high, thereby affecting the work efficiency, is solved.

Description

Technical Field

[0001] This invention relates to the field of electricity meter technology, and in particular to a non-destructive replacement device and control method for a mutual inductance three-phase electricity meter. Background Technology

[0002] With rapid economic development and the continuous improvement of people's living standards, the demand for electricity from all sectors is increasing, and the uneven distribution of electricity consumption at different times is becoming increasingly serious. Users are also demanding higher reliability from their electricity users. To alleviate the contradiction between electricity supply and demand, regulate load curves, improve the uneven distribution of electricity consumption, increase electricity efficiency, and rationally utilize electricity resources, time-of-use (TOU) billing for users' electricity consumption is adopted using electricity meters.

[0003] Currently, the main problem with three-phase energy meters equipped with junction boxes is the potential for underreporting of actual electricity consumption during meter replacement, resulting in economic losses for power companies. Replacing these meters without power outages requires disconnecting and reconnecting the meter's power supply lines, and the current transformer (CT) must not be open-circuited during the replacement process. Two existing meter replacement methods exist: one uses a parallel design with two meter positions, installing the new meter first and then removing the old one; the other uses a third meter connected in parallel within the metering circuit, where the electricity reading after installation is the amount the user needs to refund. However, these existing methods require on-site verification by the user, leading to high manpower and material costs and impacting work efficiency. Summary of the Invention

[0004] This invention provides a non-destructive replacement device and control method for mutual inductance three-phase energy meters, which solves the technical problem that the existing energy meter replacement methods require on-site confirmation by the user, resulting in high manpower and material costs and affecting work efficiency.

[0005] The first aspect of the present invention provides a non-destructive replacement device for a mutual inductance three-phase energy meter, comprising a power supply connection line, a combined junction box connection mechanism, and a mutual inductance three-phase energy meter connection mechanism.

[0006] The connecting power line is used to connect the combined junction box connection mechanism and the mutual inductance three-phase energy meter connection mechanism.

[0007] The combined junction box connection mechanism is connected to one end of the connecting power cord, and the combined junction box connection mechanism is used to connect to the combined junction box;

[0008] The mutual inductance three-phase energy meter connection mechanism is connected to the other end of the connection power line, and the mutual inductance three-phase energy meter connection mechanism is used to connect to the mutual inductance three-phase energy meter.

[0009] Optionally, the combined junction box connection mechanism includes a first connecting plate and a junction box connection assembly;

[0010] One end of the power cord is connected to the upper surface of the first connecting plate.

[0011] The lower end face of the first connecting plate is connected to the junction box connecting assembly.

[0012] Optionally, the junction box connection assembly includes a junction box connection plate and a first fixing block;

[0013] The junction box connecting plate has a first protrusion and a second protrusion on one side respectively;

[0014] The first protrusion is bolted to the first fixing block, and the first protrusion is used to connect the first fixing block to the junction box connection plate.

[0015] The first fixing block has a first screw hole;

[0016] The first connecting screw is movably connected to the first fixing block through the first screw hole, and the first connecting screw is used to fix the junction box connection assembly to the combined junction box;

[0017] The second protrusion has a second screw hole;

[0018] The second connecting screw is movably connected to the second protrusion through the second screw hole, and the second connecting screw is used to fix the junction box connecting assembly to the combined junction box.

[0019] Optionally, the junction box connecting plate is provided with a first groove, a second groove, a third groove and a fourth groove respectively;

[0020] A first pin mounting block is provided in the first groove, and a combined junction box A-phase voltage pin is provided at the bottom end of the first pin mounting block;

[0021] A second pin mounting block is provided in the second groove, and a B-phase voltage pin of the joint junction box is provided at the bottom end of the second pin mounting block;

[0022] A third pin mounting block is provided in the third groove, and a C-phase voltage pin of the joint junction box is provided at the bottom end of the third pin mounting block;

[0023] The fourth groove is provided with a fourth pin mounting block, and the bottom end of the fourth pin mounting block is provided with a pin in the power supply of the junction box N.

[0024] Optionally, a fifth pin mounting block, a sixth pin mounting block, and a seventh pin mounting block are fixedly connected to the bottom of the junction box connection plate.

[0025] The bottom end of the fifth pin mounting block is provided with a joint junction box A-phase current inlet pin and a joint wiring A-phase current outlet pin.

[0026] The bottom end of the sixth pin mounting block is provided with a pin for the B-phase current of the combined junction box and a pin for the B-phase current of the combined junction box.

[0027] The bottom end of the seventh pin mounting block is provided with a C-phase current inlet pin and a C-phase current outlet pin of the combined junction box.

[0028] Optionally, the mutual inductance three-phase energy meter connection mechanism includes a second connection plate and an energy meter connection assembly;

[0029] The other end of the power cord is connected to the side of the second connecting plate.

[0030] The lower end face of the second connecting plate is connected to the electricity meter connecting assembly.

[0031] Optionally, the electricity meter connection assembly includes an electricity meter connection plate;

[0032] The two ends of the power meter connection plate are respectively provided with a third protrusion and a fourth protrusion;

[0033] The third protrusion is provided with a third screw hole;

[0034] The third connecting screw is movably connected to the third protrusion through the third screw hole. The third connecting screw is used to fix the energy meter connection assembly to the mutual inductance three-phase energy meter.

[0035] The fourth protrusion is provided with a fourth screw hole;

[0036] The fourth connecting screw is movably connected to the fourth protrusion through the fourth screw hole. The fourth connecting screw is used to fix the energy meter connection assembly to the mutual inductance three-phase energy meter.

[0037] Optionally, the bottom of the power meter connection plate is fixedly connected with a first pin protrusion, a second pin protrusion, a third pin protrusion, a fourth pin protrusion, a fifth pin protrusion, a sixth pin protrusion, a seventh pin protrusion, an eighth pin protrusion, a ninth pin protrusion, and a tenth pin protrusion.

[0038] Optionally, the bottom end of the first ejector pin protrusion is provided with an A-phase current inlet ejector pin for a mutual inductance three-phase energy meter.

[0039] The bottom end of the second pin protrusion is provided with the A-phase voltage pin of the mutual inductance three-phase energy meter;

[0040] The bottom end of the third pin protrusion is provided with the A-phase current output pin of the mutual inductance three-phase energy meter.

[0041] The bottom end of the fourth pin protrusion is provided with a B-phase current inlet pin for a mutual inductance three-phase energy meter.

[0042] The bottom end of the fifth pin protrusion is provided with a B-phase voltage pin of a mutual inductance three-phase energy meter.

[0043] The bottom end of the sixth pin protrusion is provided with a B-phase current output pin of a mutual inductance three-phase energy meter.

[0044] The bottom end of the seventh pin protrusion is provided with a C-phase current inlet pin for a mutual inductance three-phase energy meter.

[0045] The bottom end of the eighth pin protrusion is provided with a C-phase voltage pin of a mutual inductance three-phase energy meter.

[0046] The bottom end of the ninth pin protrusion is provided with a C-phase current output pin of a mutual inductance three-phase energy meter.

[0047] The bottom end of the tenth pin protrusion is provided with the pin of the N power supply of the mutual inductance three-phase energy meter.

[0048] The second aspect of the present invention provides a control method for a non-destructive replacement device applied to a mutual inductance three-phase energy meter, the device comprising a power supply connection line, a junction box connection mechanism, and a mutual inductance three-phase energy meter connection mechanism, the method comprising:

[0049] One end of the power cord is connected to the junction box connection mechanism.

[0050] The other end of the power cord is connected to the connection mechanism of the mutual inductance three-phase energy meter.

[0051] The device is connected to the combined junction box via the combined junction box connection mechanism, and the three-phase energy meter to be replaced is connected to the mutual inductance energy meter connection mechanism via the mutual inductance energy meter connection mechanism.

[0052] When the voltage circuit power supply line of the three-phase energy meter to be replaced is installed in the target three-phase energy meter to be replaced, and the current circuit power supply line of the three-phase energy meter to be replaced is installed in the target three-phase energy meter to be replaced, the connection with the combined junction box is disconnected through the combined junction box connection mechanism and the power consumption data is recorded.

[0053] As can be seen from the above technical solutions, the present invention has the following advantages:

[0054] One end of the power cord connects to the junction box connection mechanism, and the other end connects to the three-phase inductor energy meter connection mechanism. The three-phase inductor energy meter to be replaced is connected to the junction box via the junction box connection mechanism. When the voltage circuit power line of the three-phase inductor energy meter to be replaced is installed in the target three-phase inductor energy meter, and the current circuit power line of the three-phase inductor energy meter to be replaced is also installed in the target three-phase inductor energy meter, the connection to the junction box is disconnected via the junction box connection mechanism, and the electricity consumption data is recorded. This solves the technical problem that existing energy meter replacement methods require on-site confirmation from the user, resulting in high manpower and material costs and affecting work efficiency. It achieves low investment cost, no user confirmation required for billing and replacement, simple management process, low management cost, simple meter replacement procedure, and convenient and quick installation of new meters. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 A schematic diagram of a non-destructive replacement device for a mutual inductance three-phase energy meter provided in an embodiment of the present invention;

[0057] Figure 2 A schematic diagram showing the connection between a non-destructive replacement device for a mutual inductance three-phase energy meter and a combined junction box and a mutual inductance three-phase energy meter, provided for an embodiment of the present invention.

[0058] Figure 3 This is a schematic diagram of the connection mechanism of the mutual inductance three-phase energy meter provided in an embodiment of the present invention;

[0059] Figure 4 This is a schematic diagram of the structure of the combined junction box connection mechanism provided in an embodiment of the present invention;

[0060] Figure 5 A flowchart illustrating the steps of a control method for a non-destructive replacement device for a mutual inductance three-phase energy meter, as provided in an embodiment of the present invention.

[0061] The meanings of the reference numerals in the attached figures are as follows:

[0062] 1. Connecting power cord; 2. First connecting plate; 3. Junction box connecting plate; 4. First fixing block; 5. First protrusion; 6. First connecting screw; 7. Second connecting screw; 8. First pin mounting block; 9. Second pin mounting block; 10. Third pin mounting block; 11. Fourth pin mounting block; 12. A-phase voltage pin of combined junction box; 13. B-phase voltage pin of combined junction box; 14. C-phase voltage pin of combined junction box; 15. N-phase power supply pin of combined junction box; 16. Fifth pin mounting block; 17. Sixth pin mounting block; 18. Seventh pin mounting block; 19. A-phase current inlet pin of combined junction box; 20. A-phase current outlet pin of combined junction box; 21. B-phase current inlet pin of combined junction box; 22. B-phase current outlet pin of combined junction box; 23. C-phase current outlet pin of combined junction box. 24. C-phase current output pin of the junction box; 25. Second connecting plate; 26. Energy meter connecting plate; 27. Third protrusion; 28. Fourth protrusion; 29. ​​Second protrusion; 30. Third connecting screw; 31. Fourth connecting screw; 32. A-phase current input pin of the mutual inductance three-phase energy meter; 33. A-phase voltage input pin of the mutual inductance three-phase energy meter; 34. A-phase voltage input pin of the mutual inductance three-phase energy meter. 35. Current output pin of mutual inductance three-phase energy meter; 36. Voltage pin of mutual inductance three-phase energy meter; 37. Current output pin of mutual inductance three-phase energy meter; 38. Current input pin of mutual inductance three-phase energy meter; 39. Voltage pin of mutual inductance three-phase energy meter; 40. Current output pin of mutual inductance three-phase energy meter; 41. Power supply pin of mutual inductance three-phase energy meter. Detailed Implementation

[0063] This invention provides a non-destructive replacement device and control method for mutual inductance three-phase energy meters, which solves the technical problem that replacing energy meters using existing methods requires on-site confirmation by the user, resulting in high manpower and material costs and affecting work efficiency.

[0064] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0065] Please see Figures 1-4 , Figure 1 This is a schematic diagram of a non-destructive replacement device for a mutual inductance three-phase energy meter provided in an embodiment of the present invention.

[0066] This invention provides a non-destructive replacement device for a three-phase inductor energy meter, comprising a connecting power line 1, a combined junction box connection mechanism, and a three-phase inductor energy meter connection mechanism; the connecting power line 1 is used to connect the combined junction box connection mechanism and the three-phase inductor energy meter connection mechanism; the combined junction box connection mechanism is connected to one end of the connecting power line 1 and is used to connect to a combined junction box; the three-phase inductor energy meter connection mechanism is connected to the other end of the connecting power line 1 and is used to connect to the three-phase inductor energy meter.

[0067] It should be noted that you should refer to [link / reference]. Figure 2 The power cord 1 is a 10-core power cord. One end of the power cord 1 is connected to the junction box connection mechanism through a fastening mechanism, and the other end of the power cord 1 is connected to the mutual inductance three-phase energy meter connection mechanism through a fastening mechanism. The fastening mechanism is preferably a nut fastening mechanism. The outer surfaces of both ends of the power cord 1 are respectively set with threaded structures. The two ends of the power cord 1 are used in conjunction with the nut fastening mechanism to achieve a locking and fixing effect, and at the same time, it can protect the connection interfaces at both ends of the power cord. The material of the fastening mechanism is preferably insulated metal. The fastening mechanism is not limited and can be any other mechanism that can achieve a locking effect. Power cord 1 connects the combined junction box connection mechanism and the three-phase inductor energy meter connection mechanism. The combined junction box connection mechanism connects to the combined junction box, and the three-phase inductor energy meter connection mechanism connects to the three-phase inductor energy meter. The combined junction box connection mechanism connects to the combined junction box, and the three-phase inductor energy meter to be replaced connects to the three-phase inductor energy meter to be replaced. When the voltage circuit power line of the three-phase inductor energy meter to be replaced is installed at the target three-phase inductor energy meter, and the current circuit power line of the three-phase inductor energy meter to be replaced is installed at the target three-phase inductor energy meter, the connection to the combined junction box is disconnected via the combined junction box connection mechanism, and the electricity consumption data is recorded. This solves the technical problem that existing energy meter replacement methods require on-site confirmation from the user, resulting in high manpower and material costs and affecting work efficiency. It achieves low investment cost, no user confirmation required for charging and replacement, simple management process, low management cost, simple meter replacement procedure, and convenient and quick installation of new meters.

[0068] Please see Figures 1-4 , Figure 4 This is a schematic diagram of the combined junction box connection mechanism provided in an embodiment of the present invention.

[0069] This invention provides a non-destructive replacement device for a mutual inductance three-phase energy meter. The combined junction box connection mechanism includes a first connecting plate 2 and a junction box connection assembly. One end of the power supply line 1 is connected to the upper surface of the first connecting plate 2; the lower surface of the first connecting plate 2 is connected to the junction box connection assembly. The junction box connection assembly includes a junction box connecting plate 3 and a first fixing block 4. A first protrusion 5 and a second protrusion 29 are respectively provided on one side of the junction box connecting plate 3. The first protrusion 5 is bolted to the first fixing block 4, and the first protrusion 5 is used to connect the first fixing block 4 to the junction box connecting plate 3. The first fixing block 4 has a first screw hole. A first connecting screw 6 is movably connected to the first fixing block 4 through the first screw hole, and the first connecting screw 6 is used to fix the junction box connection assembly to the combined junction box. The second protrusion 29 has a second screw hole. A second connecting screw 7 is movably connected to the second protrusion 29 through the second screw hole, and the second connecting screw 7 is used to fix the junction box connection assembly to the combined junction box. The junction box connecting plate 3 is provided with a first groove, a second groove, a third groove and a fourth groove respectively; a first pin mounting block 8 is provided in the first groove, and a combined junction box A-phase voltage pin 12 is provided at the bottom of the first pin mounting block 8; a second pin mounting block 9 is provided in the second groove, and a combined junction box B-phase voltage pin 13 is provided at the bottom of the second pin mounting block 9; a third pin mounting block 10 is provided in the third groove, and a combined junction box C-phase voltage pin 14 is provided at the bottom of the third pin mounting block 10; a fourth pin mounting block 11 is provided in the fourth groove, and a combined junction box N-phase power supply pin 15 is provided at the bottom of the fourth pin mounting block 11. The bottom of the junction box connecting plate 3 is fixedly connected with a fifth pin mounting block 16, a sixth pin mounting block 17, and a seventh pin mounting block 18; the bottom end of the fifth pin mounting block 16 is provided with a combined junction box A-phase current inlet pin 19 and a combined junction box A-phase current outlet pin 20; the bottom end of the sixth pin mounting block 17 is provided with a combined junction box B-phase current inlet pin 21 and a combined junction box B-phase current outlet pin 22; the bottom end of the seventh pin mounting block 18 is provided with a combined junction box C-phase current inlet pin 23 and a combined junction box C-phase current outlet pin 24.

[0070] It should be noted that the first connecting plate 2 has a rectangular structure. The upper end of the first connecting plate 2 is connected to one end of the power cord 1, and the lower end of the first connecting plate 2 is connected to the junction box connecting assembly. The junction box connecting assembly is used to connect with the combined junction box. The junction box connecting assembly includes a junction box connecting plate 3 and a first fixing block 4. A first protrusion 5 and a second protrusion 29 are respectively provided on one side of the junction box connecting plate 3. The first protrusion 5 is located on the left side of the same side of the junction box connecting plate 3, near the edge. The second protrusion 29 is located on the left side of the same side of the junction box connecting plate 3, near the edge. On the right side near the edge of the same side of the junction box connecting plate 3, a connecting groove is provided inward at the middle of the first fixing block 4. Threaded holes are provided on both the upper and lower sides of the connecting groove. A threaded hole is also provided on the first protrusion 5. The first protrusion 5 is embedded in the connecting groove of the first fixing block 4. The threaded hole on the first protrusion 5 is the same size as the threaded holes on the upper and lower sides of the connecting groove and is penetrated by a bolt. The first protrusion 5 is fixed to the first fixing block 4 by the bolt. The first protrusion 5 is also provided with a first threaded hole for connecting to the combined junction box. The junction box connecting assembly is fixed to the combined junction box by the first connecting screw 6. The second protrusion 29 is fixedly connected to the junction box connecting plate 3. It can be integrated with the junction box connecting plate 3 or be an external protrusion. There is no limitation here. A second screw hole is provided on the second protrusion 29. The second connecting screw 7 is movably connected to the second protrusion 29 through the second screw hole. The second connecting screw 7 is used to fix the junction box connecting assembly to the combined junction box. The first protrusion 5 and the second protrusion 29 on both sides of the junction box connecting plate 3 are connected. One end of the combined junction box is fixed to the first protrusion 5 by the first connecting screw 6, and the other end of the combined junction box is fixed to the second protrusion 29 by the second connecting screw 7. The two ends are fixed, which can achieve the connection and fastening effect.The junction box connection plate 3 has a first groove, a second groove, a third groove, and a fourth groove. The first groove is located near the first protrusion 5, followed by the second, third, and fourth grooves. A first pin mounting block 8 is installed in the first groove, and the first groove is fixedly connected to the first pin mounting block 8. A combined junction box A-phase voltage pin 12 is installed at the bottom of the first pin mounting block 8, which is used to connect to the corresponding A-phase voltage interface of the combined junction box. A second pin mounting block 9 is installed in the second groove, and the second groove is fixedly connected to the second pin mounting block 9. A connecting pin is installed at the bottom of the second pin mounting block 9. A B-phase voltage pin 13 is provided in the junction box. The B-phase voltage pin 13 is used to connect to the corresponding B-phase voltage interface of the junction box. A third pin mounting block 10 is provided in the third groove, and the third groove is fixedly connected to the third pin mounting block 10. A C-phase voltage pin 14 is provided at the bottom of the third pin mounting block 10, and the C-phase voltage pin 14 is used to connect to the corresponding C-phase voltage interface of the junction box. A fourth pin mounting block 11 is provided in the fourth groove, and the fourth groove is fixedly connected to the fourth pin mounting block 11. A N-phase voltage pin 15 is provided at the bottom of the fourth pin mounting block 11, and the N-phase voltage pin of the junction box is provided. The source pin 15 is used to connect to the N power interface corresponding to the junction box. The bottom of the junction box connection plate 3 is fixedly connected to the fifth pin mounting block 16, the sixth pin mounting block 17 and the seventh pin mounting block 18. The fifth pin mounting block 16, the sixth pin mounting block 17 and the seventh pin mounting block 18 are all rectangular structures. The upper end face of the fifth pin mounting block 16 is fixedly connected to the bottom of the junction box connection plate 3. The lower end face of the fifth pin mounting block 16 is provided with the A-phase current inlet pin 19 and the A-phase current outlet pin 20 of the junction box, which are used to connect to the A-phase current inlet interface and the A-phase current outlet interface corresponding to the junction box, respectively. The upper end face of the sixth pin mounting block 17 is fixedly connected to the bottom of the junction box connecting plate 3. The lower end face of the sixth pin mounting block 17 is provided with a B-phase current inlet pin 21 and a B-phase current outlet pin 22 of the combined junction box, which are respectively used to connect to the corresponding B-phase current inlet and B-phase current outlet of the combined junction box. The upper end face of the seventh pin mounting block 18 is fixedly connected to the bottom of the junction box connecting plate 3. The lower end face of the seventh pin mounting block 18 is provided with a C-phase current inlet pin 23 and a C-phase current outlet pin 24 of the combined junction box, which are respectively used to connect to the corresponding C-phase current inlet and C-phase current outlet of the combined junction box.

[0071] Please see Figures 1-4 , Figure 3 This is a schematic diagram of the connection mechanism of the mutual inductance three-phase energy meter provided in an embodiment of the present invention.

[0072] This invention provides a non-destructive replacement device for a mutual inductance three-phase energy meter. The connection mechanism of the mutual inductance three-phase energy meter includes a second connecting plate 25 and an energy meter connection assembly. The other end of the power supply line 1 is connected to the side of the second connecting plate 25. The lower end face of the second connecting plate 25 is connected to the energy meter connection assembly. The energy meter connection assembly includes an energy meter connecting plate 26. A third protrusion 27 and a fourth protrusion 28 are respectively provided at both ends of the energy meter connecting plate 26. The third protrusion 27 has a third screw hole. A third connecting screw 30 is movably connected to the third protrusion 27 through the third screw hole, and the third connecting screw 30 is used to fix the energy meter connection assembly to the mutual inductance three-phase energy meter. The fourth protrusion 28 has a fourth screw hole. A fourth connecting screw 31 is movably connected to the fourth protrusion 28 through the fourth screw hole, and the fourth connecting screw 31 is used to fix the energy meter connection assembly to the mutual inductance three-phase energy meter. The bottom of the electricity meter connection plate 26 is fixedly connected with a first pin protrusion, a second pin protrusion, a third pin protrusion, a fourth pin protrusion, a fifth pin protrusion, a sixth pin protrusion, a seventh pin protrusion, an eighth pin protrusion, a ninth pin protrusion, and a tenth pin protrusion. The bottom end of the first pin protrusion is provided with a current inlet pin 32 for the A-phase of the mutual inductance three-phase electricity meter; the bottom end of the second pin protrusion is provided with a voltage inlet pin 33 for the A-phase of the mutual inductance three-phase electricity meter; the bottom end of the third pin protrusion is provided with a current outlet pin 34 for the A-phase of the mutual inductance three-phase electricity meter; the bottom end of the fourth pin protrusion is provided with a current inlet pin 35 for the B-phase of the mutual inductance three-phase electricity meter; and the bottom end of the fifth pin protrusion is provided with a voltage inlet pin 36 for the B-phase of the mutual inductance three-phase electricity meter. The bottom end of the sixth pin protrusion is provided with a B-phase current output pin 37 for a mutual inductance three-phase energy meter; the bottom end of the seventh pin protrusion is provided with a C-phase current input pin 38 for a mutual inductance three-phase energy meter; the bottom end of the eighth pin protrusion is provided with a C-phase voltage pin 39 for a mutual inductance three-phase energy meter; the bottom end of the ninth pin protrusion is provided with a C-phase current output pin 40 for a mutual inductance three-phase energy meter; and the bottom end of the tenth pin protrusion is provided with an N-phase power supply input pin 41 for a mutual inductance three-phase energy meter.

[0073] It should be noted that the second connecting plate 25 has a rectangular structure. The side of the second connecting plate 25 is connected to the other end of the power supply line 1, and the lower end of the second connecting plate 25 is connected to the energy meter connecting assembly. The energy meter connecting plate 26 has a third protrusion 27 and a fourth protrusion 28 at its two ends, respectively. The third protrusion 27 is located at the left end of the energy meter connecting plate 26, and the fourth protrusion 28 is located at the right end of the energy meter connecting plate 26. Both the third protrusion 27 and the fourth protrusion 28 are fixedly connected to the energy meter connecting plate 26. A third screw hole is provided on the third protrusion 27, and a third connecting screw 30 is movably connected to the third protrusion 27 through the third screw hole. The third connecting screw 30 is used to connect the energy meter connecting assembly to the mutual inductance three-phase power supply. One end of the meter is fixed, and a fourth screw hole is provided on the fourth protrusion 28. The fourth connecting screw 31 is movably connected to the fourth protrusion 28 through the fourth screw hole. The fourth connecting screw 31 is used to fix the electricity meter connection assembly to the other end of the mutual inductance three-phase electricity meter. The bottom of the electricity meter connection plate 26 is fixedly connected with a first pin protrusion, a second pin protrusion, a third pin protrusion, a fourth pin protrusion, a fifth pin protrusion, a sixth pin protrusion, a seventh pin protrusion, an eighth pin protrusion, a ninth pin protrusion and a tenth pin protrusion. The bottom end of the first pin protrusion is provided with a mutual inductance three-phase electricity meter A-phase current inlet pin 32. The mutual inductance three-phase electricity meter A-phase current inlet pin 32 is used to connect with the corresponding A-phase current inlet interface of the mutual inductance three-phase electricity meter.The bottom end of the second pin protrusion is provided with a phase A voltage pin 33 for a three-phase inductor energy meter. Phase A voltage pin 33 is used to connect to the corresponding phase A voltage interface of the three-phase inductor energy meter. The bottom end of the third pin protrusion is provided with a phase A current output pin 34 for a three-phase inductor energy meter. Phase A current output pin 34 is used to connect to the corresponding phase A current output interface of the three-phase inductor energy meter. The bottom end of the fourth pin protrusion is provided with a phase B current input pin 35 for a three-phase inductor energy meter. The phase current inlet pin 35 is used to connect to the B-phase current inlet interface corresponding to the mutual inductance three-phase energy meter. The bottom end of the fifth pin protrusion is provided with a B-phase voltage pin 36 for the mutual inductance three-phase energy meter, which is used to connect to the corresponding B-phase voltage interface. The bottom end of the sixth pin protrusion is provided with a B-phase current outlet pin 37 for the mutual inductance three-phase energy meter, which is used to connect to the corresponding B-phase current outlet interface. The bottom of the seventh pin protrusion... The eighth pin protrusion has a C-phase current inlet pin 38 for a three-phase inductor energy meter, which connects to the corresponding C-phase current inlet interface of the three-phase inductor energy meter. The bottom of the eighth pin protrusion has a C-phase voltage inlet pin 39 for a three-phase inductor energy meter, which connects to the corresponding C-phase voltage interface of the three-phase inductor energy meter. The bottom of the ninth pin protrusion has a C-phase current outlet pin 40 for a three-phase inductor energy meter. The tenth pin protrusion is connected to the C-phase current output interface corresponding to the mutual inductance three-phase energy meter. The bottom end of the tenth pin protrusion is provided with the N-power supply pin 41 of the mutual inductance three-phase energy meter. The N-power supply pin 41 of the mutual inductance three-phase energy meter is used for connection to the N-power supply interface corresponding to the mutual inductance three-phase energy meter. A first pin protrusion is located near the third protrusion 27, followed by the second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth pin protrusions in sequence.

[0074] Please see Figure 5 , Figure 5 This is a flowchart illustrating the steps of a control method for a non-destructive replacement device for a mutual inductance three-phase energy meter, as provided in an embodiment of the present invention.

[0075] This invention provides a control method for a non-destructive replacement device for a mutual inductance three-phase energy meter. The device includes a power supply line 1, a junction box connection mechanism, and a mutual inductance three-phase energy meter connection mechanism. The method includes:

[0076] Step 101: Connect one end of the power cord 1 to the junction box connection mechanism;

[0077] Step 102: Connect the other end of the power cord 1 to the connection mechanism of the mutual inductance three-phase energy meter;

[0078] Step 103: Connect to the combined junction box via the combined junction box connection mechanism, and connect the three-phase energy meter to be replaced via the mutual inductance three-phase energy meter connection mechanism;

[0079] Step 104: When the voltage circuit power supply line of the three-phase energy meter to be replaced is installed at the target three-phase energy meter to be replaced and the current circuit power supply line of the three-phase energy meter to be replaced is installed at the target three-phase energy meter to be replaced, disconnect the connection with the combined junction box through the combined junction box connection mechanism and record the power consumption data.

[0080] In this embodiment of the invention, one end of the power cord 1 is connected to the combined junction box connection mechanism, and the other end of the power cord 1 is connected to the mutual inductance three-phase energy meter connection mechanism. The connection is made via the combined junction box connection mechanism, and a suspension method is used to ensure that the pins on the mutual inductance three-phase energy meter connection mechanism do not touch any personnel or objects. Then, the mutual inductance three-phase energy meter connection mechanism is connected to the mutual inductance three-phase energy meter to be replaced (the old energy meter). Then, the mutual inductance three-phase energy meter to be replaced is removed. The process involves installing a new three-phase inductive energy meter, suspending the meter to be replaced, and then disconnecting the power cord of the voltage circuit of each new inductive energy meter and installing it in the corresponding position of the target new inductive energy meter. The same process is repeated for the current circuit of the new inductive energy meter. The connection to the junction box is then disconnected via the junction box connection mechanism, and the new inductive energy meter is removed. The electricity consumption data is recorded. Through the installation and connection of the non-destructive replacement device, the old energy meter has two power lines connected, and removing one power line does not affect the normal metering function of the old energy meter.

[0081] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0082] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0083] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A non-destructive replacement device for a mutual inductance type three-phase electric energy meter, characterized by, This includes connecting power cords, a combined junction box connection mechanism, and a mutual inductance three-phase energy meter connection mechanism; The connecting power line is used to connect the combined junction box connection mechanism and the mutual inductance three-phase energy meter connection mechanism. The combined junction box connection mechanism is connected to one end of the connecting power cord, and the combined junction box connection mechanism is used to connect to the combined junction box; The mutual inductance three-phase energy meter connection mechanism is connected to the other end of the connection power line, and the mutual inductance three-phase energy meter connection mechanism is used to connect to the mutual inductance three-phase energy meter. The combined junction box connection mechanism includes a first connection plate and a junction box connection assembly; One end of the power cord is connected to the upper surface of the first connecting plate. The lower end face of the first connecting plate is connected to the junction box connecting assembly; The junction box connection assembly includes a junction box connection plate and a first fixing block; The junction box connecting plate has a first protrusion and a second protrusion on one side respectively; The first protrusion is bolted to the first fixing block, and the first protrusion is used to connect the first fixing block to the junction box connection plate. The first fixing block has a first screw hole; The first connecting screw is movably connected to the first fixing block through the first screw hole, and the first connecting screw is used to fix the junction box connection assembly to the combined junction box; The second protrusion has a second screw hole; The second connecting screw is movably connected to the second protrusion through the second screw hole, and the second connecting screw is used to fix the junction box connection assembly to the combined junction box; The junction box connecting plate is provided with a first groove, a second groove, a third groove and a fourth groove respectively; A first pin mounting block is provided in the first groove, and a combined junction box A-phase voltage pin is provided at the bottom end of the first pin mounting block; A second pin mounting block is provided in the second groove, and a B-phase voltage pin of the joint junction box is provided at the bottom end of the second pin mounting block; A third pin mounting block is provided in the third groove, and a C-phase voltage pin of the joint junction box is provided at the bottom end of the third pin mounting block; A fourth pin mounting block is provided in the fourth groove, and a pin in the power supply of the joint junction box N is provided at the bottom end of the fourth pin mounting block. The bottom of the junction box connection plate is fixedly connected to a fifth pin mounting block, a sixth pin mounting block, and a seventh pin mounting block; The bottom end of the fifth pin mounting block is provided with a joint junction box A-phase current inlet pin and a joint wiring A-phase current outlet pin. The bottom end of the sixth pin mounting block is provided with a pin for the B-phase current of the combined junction box and a pin for the B-phase current of the combined junction box. The bottom end of the seventh pin mounting block is provided with a C-phase current inlet pin and a C-phase current outlet pin of the combined junction box.

2. The apparatus for lossless replacement of a mutual inductance type three-phase electric energy meter according to claim 1, characterized in that, The mutual inductance three-phase energy meter connection mechanism includes a second connection plate and an energy meter connection assembly. The other end of the power cord is connected to the side of the second connecting plate. The lower end face of the second connecting plate is connected to the electricity meter connecting assembly.

3. The apparatus for lossless replacement of a mutual inductance type three-phase electric energy meter according to claim 2, characterized in that, The electricity meter connection assembly includes an electricity meter connection plate; The two ends of the power meter connection plate are respectively provided with a third protrusion and a fourth protrusion; The third protrusion is provided with a third screw hole; The third connecting screw is movably connected with the third protrusion through the third screw hole, and is used for fixing the electric energy meter connecting assembly and the mutual inductance type three-phase electric energy meter; The fourth protrusion is provided with a fourth screw hole; The fourth connecting screw is movably connected with the fourth protrusion through the fourth screw hole, and is used for fixing the electric energy meter connecting assembly and the mutual inductance type three-phase electric energy meter.

4. The apparatus for lossless replacement of a mutual inductance type three-phase electric energy meter according to claim 2, characterized in that, The bottom of the electric energy meter connecting plate body is fixedly connected with a first thimble protrusion, a second thimble protrusion, a third thimble protrusion, a fourth thimble protrusion, a fifth thimble protrusion, a sixth thimble protrusion, a seventh thimble protrusion, an eighth thimble protrusion, a ninth thimble protrusion and a tenth thimble protrusion.

5. The apparatus for lossless replacement of a mutual inductance type three-phase electric energy meter according to claim 4, characterized in that, The bottom end of the first thimble protrusion is provided with a mutual inductance type three-phase electric energy meter A-phase current input thimble; The bottom end of the second thimble protrusion is provided with a mutual inductance type three-phase electric energy meter A-phase voltage thimble; The bottom end of the third thimble protrusion is provided with a mutual inductance type three-phase electric energy meter A-phase current output thimble; The bottom end of the fourth thimble protrusion is provided with a mutual inductance type three-phase electric energy meter B-phase current input thimble; The bottom end of the fifth thimble protrusion is provided with a mutual inductance type three-phase electric energy meter B-phase voltage thimble; The bottom end of the sixth thimble protrusion is provided with a mutual inductance type three-phase electric energy meter B-phase current output thimble; The bottom end of the seventh thimble protrusion is provided with a mutual inductance type three-phase electric energy meter C-phase current input thimble; The bottom end of the eighth thimble protrusion is provided with a mutual inductance type three-phase electric energy meter C-phase voltage thimble; The bottom end of the ninth thimble protrusion is provided with a mutual inductance type three-phase electric energy meter C-phase current output thimble; The bottom end of the tenth thimble protrusion is provided with a mutual inductance type three-phase electric energy meter N power supply middle thimble.

6. A control method for a lossless replacement device applied to a mutual inductance type three-phase electric energy meter, characterized by, The nondestructive replacement device applied to the mutual inductance type three-phase electric energy meter of any one of claims 1-5, the device comprising a connection power line, a joint junction box connecting mechanism and a mutual inductance type three-phase electric energy meter connecting mechanism, and the method comprising: Connecting one end of the connection power line with the joint junction box connecting mechanism; Connecting the other end of the connection power line with the mutual inductance type three-phase electric energy meter connecting mechanism; Connecting the replacement mutual inductance type three-phase electric energy meter through the joint junction box connecting mechanism and the joint junction box connecting mechanism and the mutual inductance type three-phase electric energy meter connecting mechanism; When the voltage loop power line of the replacement mutual inductance type three-phase electric energy meter is installed on the target replacement mutual inductance type three-phase electric energy meter and the current loop power line of the replacement mutual inductance type three-phase electric energy meter is installed on the target replacement mutual inductance type three-phase electric energy meter, disconnecting the joint junction box through the joint junction box connecting mechanism and recording the power consumption data.

Images